333
FNCA52 TJSJ 170730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST FRI APR 17 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-172000-
SOUTHEAST COASTAL PLAINS-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 50 30
TEMP (24H TREND) 87 (+2) 70 (-2) 87
RH % (24H TREND) 53 (-6) 90 (0) 53
WIND 20FT/EARLY(MPH) E 14 E 12 E 14
WIND 20FT/LATE(MPH) E 16 NE 10 E 16
MIXING HGT(FT-AGL/MSL)4350 4490
TRANSPORT WND (MPH) E 14 E 12
VENT RATE (KT-FT) 52200 44900
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-172000-
SOUTHERN HILLS-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 30 50
TEMP (24H TREND) 83 (+2) 66 (-3) 83
RH % (24H TREND) 66 (-6) 98 (+5) 67
WIND 20FT/EARLY(MPH) E 11 E 10 E 10
WIND 20FT/LATE(MPH) E 11 E 10 E 11
MIXING HGT(FT-AGL/MSL)4950 5450
TRANSPORT WND (MPH) E 13 E 10
VENT RATE (KT-FT) 54450 49050
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-172000-
NORTH COASTAL PLAINS-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 80 40 30
TEMP (24H TREND) 86 (0) 69 (-2) 86
RH % (24H TREND) 64 (-3) 100 (+3) 63
WIND 20FT/EARLY(MPH) E 11 E 11 E 12
WIND 20FT/LATE(MPH) E 12 E 10 E 14
MIXING HGT(FT-AGL/MSL)3710 4370
TRANSPORT WND (MPH) E 12 E 13
VENT RATE (KT-FT) 37100 48070
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-172000-
NORTHERN HILLS-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 80 20 60
TEMP (24H TREND) 85 (+1) 67 (-2) 85
RH % (24H TREND) 65 (-3) 99 (+2) 67
WIND 20FT/EARLY(MPH) E 10 E 10 E 10
WIND 20FT/LATE(MPH) E 11 E 9 E 12
MIXING HGT(FT-AGL/MSL)5140 5380
TRANSPORT WND (MPH) E 9 E 9
VENT RATE (KT-FT) 41120 43040
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-172000-
WEST COAST-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 90 30 70
TEMP (24H TREND) 88 (+1) 69 (-2) 87
RH % (24H TREND) 61 (-3) 97 (+4) 63
WIND 20FT/EARLY(MPH) E 12 E 10 E 11
WIND 20FT/LATE(MPH) E 12 E 9 E 11
MIXING HGT(FT-AGL/MSL)4610 4860
TRANSPORT WND (MPH) E 9 E 7
VENT RATE (KT-FT) 36880 29160
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-172000-
EASTERN INTERIOR-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 80 60 40
TEMP (24H TREND) 84 (+2) 68 (-2) 83
RH % (24H TREND) 67 (-5) 99 (+2) 66
WIND 20FT/EARLY(MPH) E 12 E 13 E 11
WIND 20FT/LATE(MPH) E 12 E 12 E 11
MIXING HGT(FT-AGL/MSL)3740 4560
TRANSPORT WND (MPH) E 13 E 12
VENT RATE (KT-FT) 41140 45600
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-172000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 90 70 50
TEMP (24H TREND) 80 (+2) 66 (-3) 79
RH % (24H TREND) 72 (-5) 100 (+1) 70
WIND 20FT/EARLY(MPH) E 10 E 10 E 10
WIND 20FT/LATE(MPH) E 10 E 9 E 10
MIXING HGT(FT-AGL/MSL)2690 3490
TRANSPORT WND (MPH) E 14 E 13
VENT RATE (KT-FT) 32280 38390
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-172000-
CENTRAL MOUNTAIN RANGE-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 90 20 80
TEMP (24H TREND) 83 (+3) 64 (-3) 82
RH % (24H TREND) 66 (-5) 99 (+4) 69
WIND 20FT/EARLY(MPH) E 8 E 5 E 8
WIND 20FT/LATE(MPH) E 8 E 5 E 8
MIXING HGT(FT-AGL/MSL)5760 6170
TRANSPORT WND (MPH) E 9 E 7
VENT RATE (KT-FT) 46080 37020
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-172000-
CAYEY MOUNTAIN RANGE-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 50 40
TEMP (24H TREND) 79 (+1) 67 (-2) 78
RH % (24H TREND) 74 (-4) 100 (+1) 72
WIND 20FT/EARLY(MPH) E 9 E 9 E 9
WIND 20FT/LATE(MPH) E 10 E 8 E 9
MIXING HGT(FT-AGL/MSL)3910 3870
TRANSPORT WND (MPH) E 14 E 13
VENT RATE (KT-FT) 46920 42570
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-172000-
VIEQUES-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 70 60
TEMP (24H TREND) 85 (0) 72 (-1) 85
RH % (24H TREND) 62 (-4) 91 (-2) 60
WIND 20FT/EARLY(MPH) E 14 E 16 E 14
WIND 20FT/LATE(MPH) E 14 E 14 E 13
MIXING HGT(FT-AGL/MSL)3250 3240
TRANSPORT WND (MPH) E 18 E 16
VENT RATE (KT-FT) 52000 45360
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-172000-
CULEBRA-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 70 60
TEMP (24H TREND) 87 (+1) 74 (-1) 87
RH % (24H TREND) 61 (-7) 92 (+2) 59
WIND 20FT/EARLY(MPH) E 14 E 16 E 14
WIND 20FT/LATE(MPH) E 14 E 14 E 13
MIXING HGT(FT-AGL/MSL)3340 3250
TRANSPORT WND (MPH) E 17 E 16
VENT RATE (KT-FT) 50100 45500
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-172000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 50
TEMP (24H TREND) 88 (+1) 70 (-2) 88
RH % (24H TREND) 51 (-6) 91 (+2) 52
WIND 20FT/EARLY(MPH) E 17 E 13 E 16
WIND 20FT/LATE(MPH) E 17 E 13 E 16
MIXING HGT(FT-AGL/MSL)4860 5100
TRANSPORT WND (MPH) E 16 E 13
VENT RATE (KT-FT) 68040 56100
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-172000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 50 60
TEMP (24H TREND) 85 (+1) 73 (-3) 85
RH % (24H TREND) 61 (-6) 92 (+5) 59
WIND 20FT/EARLY(MPH) E 16 E 16 E 16
WIND 20FT/LATE(MPH) E 14 E 16 E 14
MIXING HGT(FT-AGL/MSL)3350 3350
TRANSPORT WND (MPH) E 20 E 18
VENT RATE (KT-FT) 56950 53600
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-172000-
ST CROIX-
330 AM AST FRI APR 17 2026
TODAY TONIGHT SAT
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 60 60
TEMP (24H TREND) 86 (+1) 72 (-3) 86
RH % (24H TREND) 62 (-7) 94 (+4) 60
WIND 20FT/EARLY(MPH) E 14 E 14 E 14
WIND 20FT/LATE(MPH) E 14 E 14 E 14
MIXING HGT(FT-AGL/MSL)3560 3920
TRANSPORT WND (MPH) E 17 E 18
VENT RATE (KT-FT) 53400 62720
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page